Secondary electrical distribution spool insulator



FIG. 1 is the top plan view of a spool insulator showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a top plan view of a modified embodiment of the spool insulator;

FIG. 5 is a bottom plan view of FIG. 4;

FIG. 6 is a side elevation view of FIG. 4;

FIG. 7 is a top plan view of a second modified embodiment of the spool insulator;

FIG. 8 is a bottom plan view of FIG. 7; and,

FIG. 9 is a side elevation view of FIG. 7.

The broken line portions of the spool insulator are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a secondary electrical distribution spool insulator, as shown and described. 